全文获取类型
收费全文 | 18686篇 |
免费 | 1132篇 |
国内免费 | 123篇 |
专业分类
耳鼻咽喉 | 193篇 |
儿科学 | 256篇 |
妇产科学 | 254篇 |
基础医学 | 2521篇 |
口腔科学 | 438篇 |
临床医学 | 1708篇 |
内科学 | 3765篇 |
皮肤病学 | 504篇 |
神经病学 | 2103篇 |
特种医学 | 1205篇 |
外科学 | 3531篇 |
综合类 | 110篇 |
一般理论 | 5篇 |
预防医学 | 619篇 |
眼科学 | 207篇 |
药学 | 1175篇 |
中国医学 | 13篇 |
肿瘤学 | 1334篇 |
出版年
2024年 | 11篇 |
2023年 | 171篇 |
2022年 | 269篇 |
2021年 | 503篇 |
2020年 | 340篇 |
2019年 | 448篇 |
2018年 | 512篇 |
2017年 | 422篇 |
2016年 | 512篇 |
2015年 | 639篇 |
2014年 | 774篇 |
2013年 | 869篇 |
2012年 | 1478篇 |
2011年 | 1581篇 |
2010年 | 963篇 |
2009年 | 895篇 |
2008年 | 1320篇 |
2007年 | 1343篇 |
2006年 | 1263篇 |
2005年 | 1183篇 |
2004年 | 1067篇 |
2003年 | 975篇 |
2002年 | 918篇 |
2001年 | 184篇 |
2000年 | 141篇 |
1999年 | 177篇 |
1998年 | 152篇 |
1997年 | 159篇 |
1996年 | 86篇 |
1995年 | 81篇 |
1994年 | 68篇 |
1993年 | 46篇 |
1992年 | 55篇 |
1991年 | 43篇 |
1990年 | 38篇 |
1989年 | 36篇 |
1988年 | 29篇 |
1987年 | 20篇 |
1986年 | 27篇 |
1985年 | 14篇 |
1984年 | 15篇 |
1983年 | 12篇 |
1982年 | 10篇 |
1981年 | 6篇 |
1980年 | 9篇 |
1979年 | 6篇 |
1978年 | 8篇 |
1975年 | 6篇 |
1974年 | 5篇 |
1973年 | 5篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
2.
3.
4.
Walter S Speidl Markus Exner Jasmin Amighi Wolfgang Mlekusch Schila Sabeti Stefan P Kastl Gerlinde Zorn Gerald Maurer Oswald Wagner Kurt Huber Erich Minar Johann Wojta Martin Schillinger 《Journal of endovascular therapy》2007,14(1):62-69
PURPOSE: To investigate whether balloon angioplasty of the superficial femoral artery (SFA) increases serum levels of C5a and whether C5a predicts risk of restenosis. METHODS: C5a antigen was measured at baseline and 8 hours after intervention in 131 consecutive patients (76 women; median age 72 years) with intermittent claudication who underwent successful primary SFA balloon angioplasty. Patients were followed for a median 10 months [interquartile range (IQR) 6 to 14] for the occurrence of >50% restenosis by duplex ultrasound. RESULTS: Median C5a levels increased significantly from 39.7 ng/mL (IQR 27.8 to 55.0) at baseline to 53.8 ng/mL (IQR 35.6 to 85.1, p<0.001) 8 hours post intervention. During the follow-up period, 70 (53%) patients developed restenosis. Increasing levels of C5a (quartiles) at baseline were significantly associated with an increased risk for restenosis (p=0.0092). Adjusted hazard ratios (95% confidence intervals) for restenosis with increasing quartiles of baseline serum C5a levels were 1.24 (0.60 to 2.58), 1.93 (0.95 to 3.93), and 2.08 (1.02 to 4.21), respectively, compared to the lowest quartile. This effect was independent of nonspecific inflammation as reflected by plasma levels of C-reactive protein. CONCLUSION: Inflammatory mechanisms play a major role in the development of restenosis after angioplasty. The complement component C5a exerts strong chemotactic and proinflammatory effects. Enhanced complement activation prior to PTA, as measured by higher levels of C5a, was significantly associated with restenosis after SFA balloon angioplasty. Pathways of complement inhibition thus may be worth investigating with respect to improving patency rates. 相似文献
5.
6.
7.
8.
Claudia M. Dillier Daniel Trachsel Werner Baulig Claudine Gysin Andreas C. Gerber Markus Weiss 《Journal canadien d'anesthésie》2004,51(1):72-75
PURPOSE: To present a case of laryngeal damage in an infant caused by a too large and inappropriately designed cuffed tracheal tube. CLINICAL FEATURES: A 13-month-old child undergoing cardiac surgery was intubated with an uncuffed endotracheal tube with an internal diameter (ID) of 4.0 mm. Because of an important air leak around the tracheal tube during mechanical ventilation, a cuffed endotracheal tube ID 4.0 mm was inserted. The air leak with the tube cuff not inflated was acceptable at 25 cm H2O airway pressure. After extubation on the third postoperative day, the patient showed increasing stridor and respiratory deterioration. Fibreoptic laryngoscopy of the spontaneously breathing patient showed a large intra-laryngeal web. After surgical removal of the web, the child rapidly recovered and was discharged from the hospital on the 12th postoperative day. Inspection of the 4.0 mm (ID) cuffed tracheal tube revealed a cuff positioned inappropriately high and an increase of 0.7 mm in outer tube diameter compared to the 4.0 mm (ID) uncuffed tracheal tube from the same manufacturer. The tube cuff is likely to be situated within the larynx when placed in accordance to insertion depth formulas or radiological criteria, as used for uncuffed tracheal tubes in children. CONCLUSION: The larger than expected tracheal tube with its intra-laryngeal cuff position in a 13-month-old child likely caused mucosal damage and an inflammatory reaction within the larynx resulting in granulation tissue formation and fibrous healing around the tracheal tube. 相似文献
9.
Andreas Blana Stefan Denzinger Markus Lenhart Wolf F Wieland Roman Ganzer 《International journal of urology》2007,14(5):450-451
We report a case of recurrent inguinal lymphocele formation after inguinal lymphadenectomy treated by lymphographic mapping and selective ligation of the lymphatic vessels. Lymphographic mapping was performed by puncturing a lymphatic vessel at the dorsum of the foot. After isolating the vessels that drained into the lymphocele, they were clipped and divided through a small skin incision. The described technique showed an instant and complete suspension of the lymph secretion with subsequent complete healing. Lymphatic mapping and selective ligation of afferent lymphatic vessels proved to be an effective treatment of a recurrent inguinal lymphocele. 相似文献
10.
H. S. Markus A. M. Tomkins G. M. Stern 《Journal of neural transmission (Vienna, Austria : 1996)》1993,5(2):117-125
Summary An anthropometric study was performed in 95 subjects (53 male, 42 female) with Parkinson's disease. Weight, height, triceps and biceps skin-fold thicknesses, and mid-arm circumference were recorded. A high incidence of undernutrition was found (23.6% of males and 22.5% of females, as defined by recent British guidelines). A subgroup of severely disabled patients with Parkinson's disease had a significantly lower mean body mass index than a similarly disabled control group with chronic pyramidal upper motor neuron lesions (males 20.6v 23.2 kg/m2 p<0.05; females 20.6v 26.6 kg/m2 p<0.01), suggesting that the undernutrition is not due to chronic illness or immobility alone. Correlation between anthropometric indices and clinical features of disease demonstrated that the presence of moderate or severe dyskinetic movements was the clinical parameter most strongly related to undernutrition. The reduction in anthropometric indices was most marked for skin fold thickness (related to percentage body fat) and least for arm muscle circumference (related to lean body mass); therefore the weight loss seen in Parkinson's disease is primarily due to fat loss rather than muscle loss. 相似文献